<template>
    <div class="side-menu-wrapper">
        <slot></slot>
        <Menu ref="menu" v-show="!collapsed" :active-name="activeName" :open-names="openedNames" :accordion="accordion" :theme="theme" width="auto" @on-select="handleSelect">
            <template v-for="item in menuList">
                <template v-if="item.children && item.children.length === 1">
                    <side-menu-item v-if="showChildren(item)" :key="`menu-${item.name}`" :parent-item="item"></side-menu-item>
                    <menu-item v-else :name="getNameOrHref(item, true)" :key="`menu-${item.children[0].name}`"><common-icon :type="item.children[0].icon || ''"/><span>{{ showTitle(item.children[0]) }}</span></menu-item>
                </template>
                <template v-else>
                    <side-menu-item v-if="showChildren(item)" :key="`menu-${item.name}`" :parent-item="item"></side-menu-item>
                    <menu-item v-else :name="getNameOrHref(item)" :key="`menu-${item.name}`"><common-icon :type="item.icon || ''"/><span>{{ showTitle(item) }}</span></menu-item>
                </template>
            </template>
        </Menu>
        <div class="menu-collapsed" v-show="collapsed" :list="menuList">
            <template v-for="item in menuList">
                <collapsed-menu v-if="item.children && item.children.length > 1" @on-click="handleSelect" hide-title :root-icon-size="rootIconSize" :icon-size="iconSize" :theme="theme" :parent-item="item" :key="`drop-menu-${item.name}`"></collapsed-menu>
                <Tooltip transfer v-else :content="(item.meta && item.meta.title) || (item.children && item.children[0] && item.children[0].meta.title)" placement="right" :key="`drop-menu-${item.name}`">
                    <a @click="handleSelect(getNameOrHref(item, true))" class="drop-menu-a" :style="{textAlign: 'center'}"><common-icon :size="rootIconSize" :color="textColor" :type="item.icon || (item.children && item.children[0].icon)"/></a>
                </Tooltip>
            </template>
        </div>
    </div>
</template>
<script>
    import SideMenuItem from './side-menu-item.vue';
    import CollapsedMenu from './collapsed-menu.vue';
    import { getUnion } from '../../../../libs/tools';
    import mixin from './mixin';

    export default {
        name: 'SideMenu',
        mixins: [ mixin ],
        components: {
            SideMenuItem,
            CollapsedMenu
        },
        props: {
            menuList: {
                type: Array,
                default () {
                    return [];
                }
            },
            collapsed: {
                type: Boolean
            },
            theme: {
                type: String,
                default: 'dark'
            },
            rootIconSize: {
                type: Number,
                default: 20
            },
            iconSize: {
                type: Number,
                default: 16
            },
            accordion: Boolean,
            activeName: {
                type: String,
                default: ''
            },
            openNames: {
                type: Array,
                default: () => []
            }
        },
        data () {
            return {
                openedNames: []
            };
        },
        methods: {
            handleSelect (name) {
                this.$emit('on-select', name);
            },
            getOpenedNamesByActiveName (name) {
                return this.$route.matched.map(item => item.name).filter(item => item !== name);
            },
            updateOpenName (name) {
                if (name === 'home') this.openedNames = [];
                else this.openedNames = this.getOpenedNamesByActiveName(name);
            }
        },
        computed: {
            textColor () {
                return this.theme === 'dark' ? '#fff' : '#495060';
            }
        },
        watch: {
            activeName (name) {
                if (this.accordion) this.openedNames = this.getOpenedNamesByActiveName(name);
                else this.openedNames = getUnion(this.openedNames, this.getOpenedNamesByActiveName(name));
            },
            openNames (newNames) {
                this.openedNames = newNames;
            },
            openedNames () {
                this.$nextTick(() => {
                    this.$refs.menu.updateOpened();
                });
            }
        },
        mounted () {
            this.openedNames = getUnion(this.openedNames, this.getOpenedNamesByActiveName(name));
        }
    };
</script>
<style lang="less">
    @import './side-menu.less';
</style>
